Abstract: The embodiments of the present disclosure provide a method and a system for leakage analysis of an urban pipeline, and a storage medium. The method includes: obtaining sample signal data of an original signal and a corresponding first waveform diagram; obtaining at least two first components and a second component by processing the sample signal data based on preset iteration operations; determining a mutual information entropy of two adjacent first components in the at least two first components; determining high-frequency signal data of the original signal based on the mutual information entropy; determining an effective characteristic signal and a corresponding second waveform diagram based on the high-frequency signal data and the sample signal data; determining whether the urban pipeline leaks based on the second waveform diagram; and in response to that the urban pipeline leaks, determining a leakage aperture of the urban pipeline based on the effective characteristic signal.

Abstract: Disclosed is an urban non-metallic pipeline leakage location method, the method comprise the following steps: determining whether leakage occurs in a pipeline through numerical simulation law analysis or a Markov chain-based flow analysis method; for a leaking pipeline, establishing an inverse-transient control equation for non-metallic pipeline gas leakage, and obtaining pressure and flow rate data of each measuring point in different periods of time through experiments and substituting the data into the control equation to analyze experimental data; and defining a nonlinear programming problem of an objective function with a least squares criterion, and applying a sequential quadratic programming method to minimize the objective function, so as to determine the size and position of the leakage.

Abstract: Disclosed is an urban non-metallic pipeline leakage location method, the method comprise the following steps: determining whether leakage occurs in a pipeline through numerical simulation law analysis or a Markov chain-based flow analysis method; for a leaking pipeline, establishing an inverse-transient control equation for non-metallic pipeline gas leakage, and obtaining pressure and flow rate data of each measuring point in different periods of time through experiments and substituting the data into the control equation to analyze experimental data; and defining a nonlinear programming problem of an objective function with a least squares criterion, and applying a sequential quadratic programming method to minimize the objective function, so as to determine the size and position of the leakage.